How do I calculate audio file size from bitrate and duration?

Enter audio duration (minutes and seconds) and choose bitrate (64 kbps up to 320 kbps MP3, or 1411 kbps uncompressed WAV) to compute exact file size in Megabytes.

How large is a 3-minute MP3 song at 320 kbps?

A 3-minute audio track at 320 kbps equals approximately 7.2 Megabytes (MB).

What is the formula for calculating audio file size?

Formula: `File Size (MB) = (Bitrate in kbps * Duration in Seconds) / 8192`.

How much smaller is 128 kbps MP3 compared to CD Audio (WAV)?

128 kbps MP3 is over 90% smaller than uncompressed 1411 kbps 16-bit 44.1 kHz WAV audio.

Can I calculate total storage needed for a podcast RSS feed?

Yes. Multiply single episode size by episode count to estimate monthly hosting bandwidth.

Can I calculate required bitrate to fit under a specific email cap?

Yes. Switch to reverse calculator mode to find the maximum bitrate for a target size.

Is the calculator free and client-side?

Yes. Calculates in real time with instant formula feedback.

NexLove Calculator

Audio Bitrate Calculator

Calculate uncompressed and compressed audio file sizes for MP3 (128k, 192k, 320k), WAV (16-bit, 24-bit 44.1kHz/48kHz/96kHz), and FLAC audio files.

TL;DR: Audio Bitrate Calculator is a 100% free browser-based calculator utility. Calculate audio file size from sample rate, bit depth, channels, and duration.

Audio Duration (minutes)

Audio Format

Understanding Audio Bitrate Calculator

Calculate uncompressed and compressed audio file sizes for MP3 (128k, 192k, 320k), WAV (16-bit, 24-bit 44.1kHz/48kHz/96kHz), and FLAC audio files. Designed for creators, video editors, audio engineers, web designers, and developers who need instant, high-precision processing without software installation, watermarks, or file uploads.

Mathematical Formula & Technical Methodology

\text{PCM Bitrate} = \text{Sample Rate} \times \text{Bit Depth} \times \text{Channels}

Formula Variables Explained:
Calculates uncompressed PCM audio transmission speed and file size.

Step-by-Step Worked Example

A 5-minute stereo 24-bit 48kHz WAV recording requires 82.4 MB of storage.

100% Client-Side Privacy Guarantee

All media decoding, manipulation, calculations, and encoding execute locally inside your web browser using HTML5 Canvas, Web Audio API, WebCodecs, Web Crypto, and modern JavaScript engines. Zero server uploads, zero telemetry, and no registration required.

Frequently Asked Questions

: Enter audio duration (minutes and seconds) and choose bitrate (64 kbps up to 320 kbps MP3, or 1411 kbps uncompressed WAV) to compute exact file size in Megabytes.
: A 3-minute audio track at 320 kbps equals approximately 7.2 Megabytes (MB).
: Formula: `File Size (MB) = (Bitrate in kbps * Duration in Seconds) / 8192`.
: 128 kbps MP3 is over 90% smaller than uncompressed 1411 kbps 16-bit 44.1 kHz WAV audio.
: Yes. Multiply single episode size by episode count to estimate monthly hosting bandwidth.
: Yes. Switch to reverse calculator mode to find the maximum bitrate for a target size.
: Yes. Calculates in real time with instant formula feedback.

Embed This Tool

Add the live Audio Bitrate Calculator to your own website with this embed code:

<iframe src="https://nexlove.org/embed/audio-bitrate-calculator.html" width="100%" height="650" style="border:1px solid #e2e8f0;border-radius:12px" title="Audio Bitrate Calculator — NexLove" loading="lazy"></iframe>

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